For someone who is used to 24 hour clock format, its much easier managing times with this format. So if it could be possible to have it, that would be awesome.
If this is not possible, then an indicator on the assignment editor if your at AM or PM when editing the numbers. Dont know if this is an oversight, bug, or what, but it feels strange that you have to guess, click "OK" and then view the "Mangage assignments" to see if you got the AM or PM time.
Best regards,